INSTITUTE, PUSA, FOR 1919-20 • 97 



nid parasites during the cold season when the adult Taba- 

 nid flies are said to be absent. 



" I started collecting egg-masses and examining them 

 for parasites from the beginning of November 1919. On the 

 3rd November 1919, 33 egg-masses of Tabanus sanguineus, 

 11 egg-masses of T. albimedius and 7 of Chrysops stimulans 

 were obtained. Nearly half of these eggs were found 

 empty. The egg-masses of larger species, namely T. 

 albimedius and T. sanguineus, were found infested with 

 parasites, the Chrysops eggs being free from the parasite. 

 On 10th November 1919, parasitized egg-masses of T. 

 albimedius and T. crassus were collected; parasites from 

 the eggs of both these species were seen emerging on 11th 

 and 12th November. Two T. albimedius were seen on the 

 river bank on this date. On 15th November 1919, nine 

 egg-masses of T. sanguineus, two egg-masses of T. albi- 

 medius, eleven of T. bicallosus and one of C. stimulans were 

 collected. Parasites from egg-masses of T. sanguineus and 

 T. albimedius only were noted to emerge from 17th to 20th 

 November 1919. One adult fly of Tabanus crassus was 

 seen at this time. Full-grown larvae of T. albimedius were 

 met with on 21st November 1919. On 24th November 1919, 

 57 egg-masses of T. crassus, 9 unhatched and 48 hatched, 

 were obtained. No adult fly was noted on this date. 



" On 27th November 1919, five egg-masses of Chrysops 

 stimulans and 2 hatched ones of the same species were 

 obtained. No parasites were found to emerge from these 

 eggs. 



" Five egg-masses of T. albimedius and 4 old egg-masses 

 of the same species were collected on 28th November 1919. 

 Parasites from these eggs were noted on 30th November 

 1919. No trace was seen of T. hilaris, T. nemocallosus or 

 T. brunnipennis, which are common during the Rains at 

 Pusa. Full-grown and also young larvae of T. albimedius 

 were obtained on 30th November. 



" Three egg-masses of T. bicallosus were collected on 

 30th November. From one of these there emerged four 



